962 0134OM 0134 Onan RSS100 RSS200 Transfer Switch Operator's Manual (08 2007)

User Manual: 962-0134 Onan RSS100 RSS200 Transfer Switch Operator's manual (08-2007)

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Table of Contents

Operator Manual

Transfer Switch

RSS100 and RSS200

English 8-2007 962−0134

Table of Contents

SECTION TITLE PAGE

SAFETY PRECAUTIONS ii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1. INTRODUCTION 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

About This Manual 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transfer Switch Function 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. DESCRIPTION 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transfer Switch With Control 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ATS Status LEDs 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Membrane Pushbuttons 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Control Time Delays 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Time Delay Engine Start (TDES) 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Time Delay Engine Cooldown (TDEC) 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Time Delay Normal to Emergency (TDNE) (Transfer) 2-3. . . . . . . . . . . . . . . . . . . . . .

Time Delay Emergency to Normal (TDEN) (Retransfer) 2-3. . . . . . . . . . . . . . . . . . . .

3. OPERATION 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transfer Switches with an Operator Panel 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Override 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Complete System Test 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Generator Exerciser 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting An Exercise Period 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Canceling Repeat Exercise Periods 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Canceling An Active Exercise Period 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Power Source Failure During An Active Exercise Period 3-3. . . . . . . . . . . . . . . . . . .

4. TROUBLESHOOTING 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operator Panel LED Indicators 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Troubleshooting the Transfer Switch 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

How to Obtain Service 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Safety Precautions

This manual includes the following symbols to indi-

cate potentially dangerous conditions. Read the

manual carefully and know when these conditions

exist. Then take the necessary steps to protect per-

sonnel and the equipment.

DANGER This symbol warns of immediate

hazards that will result in severe personal injury

or death.

WARNING This symbol refers to a hazard or

unsafe practice that can result in severe per-

sonal injury or death.

CAUTION This symbol refers to a hazard or

unsafe practice that can result in personal inju-

ry or product or property damage.

ELECTRICAL SHOCK CAN CAUSE

SEVERE PERSONAL INJURY OR DEATH

High voltage in transfer switch components pres-

ents serious shock hazards that can result in severe

personal injury or death. Read and follow these in-

structions.

Keep the transfer switch cabinet cover secured with

the provided mounting hardware. Only authorized

personnel are allowed to access the inside of the

cabinet.

Due to the serious shock hazard from high voltages

within the cabinet, all service and adjustments to

the transfer switch must be performed only by a

trained and experienced electrician or an autho-

rized Cummins Onan service representative.

If the cabinet must be opened for any reason:

1. Disconnect the AC utility power from the trans-

fer switch by opening the circuit breaker in the

main panel that feeds the transfer switch.

2. Move the operation selector switch on the gen-

erator set to Stop/Off.

3. Disconnect the negative (−) cable from the

generator set starting batteries.

GENERAL PRECAUTIONS

Place rubber insulative mats or dry wood platforms

over metal or concrete floors when working on any

electrical equipment. Do not wear damp clothing

(particularly wet shoes) or allow skin surfaces to be

damp when handling any electrical equipment.

Jewelry is a good conductor of electricity and

should be removed when working on the electrical

equipment.

Wear safety glasses whenever servicing the trans-

fer switch.

Do not smoke near the batteries.

Do not work on this equipment when mentally or

physically fatigued, or after consuming alcohol or

any drug.

WARNING

INCORRECT SERVICE OR REPLACEMENT OF PARTS CAN RESULT IN

DEATH, SEVERE PERSONAL INJURY, AND/OR EQUIPMENT DAMAGE. SER-

VICE PERSONNEL MUST BE TRAINED AND EXPERIENCED TO PERFORM

ELECTRICAL AND/OR MECHANICAL SERVICE.

RSS-1

1-1

1. Introduction

ABOUT THIS MANUAL

This manual covers transfer switch models pro-

duced under the Cummins® Power Generation

brand name. This manual provides information nec-

essary for operation of an RSS transfer switch with

a control.

The RSS transfer switch with a control includes an

operator panel located behind the hinged panel in

the upper left hand corner on the front of the enclo-

sure, as shown in Figure 1-1.

THE OPERATOR

PANEL IS LOCATED

BEHIND THE

HINGED COVER

FIGURE 1-1. RSS TRANSFER SWITCH

TRANSFER SWITCH FUNCTION

Transfer switches are an essential part of a standby

power system. The utility (normal power source) is

backed up by a generator (emergency power

source). Should the utility fail, the transfer switch

automatically switches the electrical load from the

utility to the generator. When utility power returns,

the transfer switch automatically switches the elec-

trical load back to the utility.

Automatic transfer switches, capable of automatic

operation without operator intervention, perform the

basic function of transferring the load to the avail-

able power source. A controller monitors each

source for allowable voltage and frequency range.

The transfer switch performs the following func-

tions:

1. Senses the interruption of utility power.

2. Sends a start signal to the generator.

3. Senses generator power is available.

4. Transfers the load to the generator.

5. Senses the return of utility power.

6. Retransfers the load to the utility.

7. Sends a stop signal to the generator.

1-2

THIS PAGE LEFT INTENTIONALLY BLANK

2-1

2. Description

This section describes how the basic components

of a transfer switch function.

TRANSFER SWITCH WITH CONTROL

Figure 2-1 shows the operator panel used with

transfer switches with a control. The panel’s fea-

tures are divided into two groups:

SATS Status LEDs

SMembrane Pushbuttons

ATS Status LEDs

The operator panel includes six LEDs that provide

Automatic Transfer Switch (ATS) status informa-

tion.

Utility Power Available − This green LED is lit

when the utility power source has acceptable output

voltage.

Generator Power Available − This amber LED is lit

when the Generator power source has acceptable

output voltage and frequency.

Both power source LEDs can be lit simultaneously.

Utility Power Connected − This green LED is lit

when the transfer switxh is connected to utility pow-

er which is supplying power to the load.

If this LED is flashing, it means that the transfer

switch has failed to connect to or disconnect from

utility power, when commanded by the control.

Generator Power Connected − This amber LED is

lit when the transfer switch is connected to the gen-

erator set which is supplying power to the load.

If this LED is flashing it means the transfer switch

has failed to connect to or disconnect from the gen-

erator set, when commanded by the control.

Test − This amber LED is lit when there is an active

test period. It flashes twice per second when the

Test pushbutton is pressed to set or cancel a test

period.

Exercise − This amber LED is lit when repeat ex-

ercise periods are set. It flashes twice per second

when the Set Exercise pushbutton is pressed to set

or cancel an exercise. It flashes once per second

during an active exercise period.

Membrane Pushbuttons

The operator panel includes three membrane push-

buttons.

Test − The Test pushbutton is used to start or cancel

a test period.

Override − The Override pushbutton is used to ter-

minate or bypass some time delays, to stop the

Power Connected LEDs from flashing as a result of

a failure to connect to or disconnect from a power

source, and to cancel an active exercise period.

Set Exercise − The Set Exercise pushbutton is

used to enable or disable repeatable exercise peri-

ods using the exerciser. The exerciser is built into

the controller. The exercise period runs for 20 min-

utes and it repeats every 28 days when an exercise

is enabled.

2-2

Test Override Set Generator

Exercise

Test

Control operation could be delayed by external source.

PowerCommand

UTILITY

POWER

AVAILABLE

LED

GENERATOR POWER

AVAILABLE LED

UTILITY

POWER

CONNECTED

LED

GENERATOR

POWER

CONNECTED

LED

ACTIVE SET OR

PROGRAMMED

EXERCISE LED

TEST

ACTIVITY LED

TEST

PUSHBUTTON

OVERRIDE

PUSHBUTTON

SET EXERCISE

PUSHBUTTON

FIGURE 2-1. CABINET DOOR (SHOWN WITHOUT HINGED COVER)

2-3

CONTROL TIME DELAYS

For transfer switches with an operator panel, the

transfer switch control uses various time delays to

break from one power source and connect to the

other source.

In the following descriptions of time delays, it is im-

portant to remember that:

SWhen the transfer switch is connected to the

Normal side, it is connected to the Utility

power source.

SWhen the transfer switch is connected to the

Emergency side, it is connected to the Gen-

erator power source.

Time Delay Engine Start (TDES)

This time delay prevents the generator set from

starting during brief utility power interruptions. This

timer starts the instant the utility fails, as detected by

the Undervoltage Sensor.

When the control senses a utility failure, the control

starts the Time Delay Engine Start (TDES) timer.

This time delay is set to 3 seconds.

If utility power returns while the TDES timer is ac-

tive, the timer is reset. When the timer expires, the

control signals the generator set to start. The timer

is not reset until utility power returns. If the Override

pushbutton is pressed while the TDES timer is ac-

tive, the TDES timer is immediately terminated and

the control signals the generator set to start.

Time Delay Engine Cooldown (TDEC)

This time delay allows the generator set to cool down

(under no load conditions) after the switch returns to

utility power.

The Time Delay Engine Cooldown (TDEC) starts

timing when the load is retransferred to utility power.

This time delay is set to 10 minutes.

When the TDES expires, the stop signal is sent to

the generator’s control to shut down the generator

and the timer is reset. Pressing the Override push-

button has no effect on this time delay.

Time Delay Normal to Emergency (TDNE)

(Transfer)

This time delay allows the generator set to stabilize

before the load is applied.

While connected to the utility, this time delay starts

after utility power fails and the generator set be-

comes available (the amber Generator Power

Available LED is lit). This time delay also starts after

the generator set becomes available when a with

load Test or Exercise period is activated.

The time delay is set to 5 seconds. If the generator

set fails any time during a TDNE, the control resets

the timer and restarts it once the generator set is

again available.

If the Override pushbutton is pressed while the

TDNE timer is active, the TDNE is terminated imme-

diately and the control transfers the load to the gen-

erator set.

Time Delay Emergency to Normal (TDEN)

(Retransfer)

While connected to Generator power, this time

delay allows utility power to stabilize before the load

is transferred back (retransferred) to the utility. This

delay also allows the generator set to operate under

load for a minimum amount of time before transfer-

ring the load back to utility power.

This time delay starts with the transfer switch con-

nected to the generator set and after the utility be-

comes available following an outage (The green

Utility Power Available LED is lit). This time delay

also starts when an active Test or Exercise period is

ended. After the delay, the transfer switch can re-

transfer the load to the utility power source.

The time delay is set to 10 minutes. If the utility fails

any time during this time delay, the control resets

the timer and restarts it once utility power becomes

available. If the generator set fails at any time during

this time delay while power is available, the timer

expires and the normal retransfer sequence takes

place.

If the Override pushbutton is pressed while the

TDEN timer is active, the TDEN timer is terminated

immediately and the transfer switch retransfers the

load back to the utility.

2-4

THIS PAGE LEFT INTENTIONALLY BLANK

3-1

3. Operation

Transfer Switch

Test Override Set Exercise

Exercise

Test

Control operation could be delayed by external source.

PowerCommand

FIGURE 3-1. CONTROL PANEL

TRANSFER SWITCHES WITH AN

OPERATOR PANEL

The transfer switch provides three operator push-

buttons and six LEDs that indicate operation status.

To access the operator panel, remove the screw se-

curing the panel cover and open the cover (see Fig-

ure 3-2).

PANEL COVER

SCREW TO

BE REMOVED

FIGURE 3-2. OPERATOR PANEL COVER

3-2

OVERRIDE

The Override pushbutton is used to:

STerminate the following system time delays:

−Time Delay Engine Start (TDES)

−Time Delay Normal to Emergency (TDNE)

−Time Delay Emergency to Normal (TDEN)

SStop the Utility Power Connected LED from

flashing as a result of a failure to connect to

or disconnect from the utility when command-

ed.

SStop the Generator Power Connected LED

from flashing as a result of a failure to con-

nect to or disconnect from the generator set

when commanded.

SCancel an active exercise period.

The engine cooldown (TDEC) time delay is not af-

fected by pressing this pushbutton.

COMPLETE SYSTEM TEST

A complete system test is recommended to verify

that the electrical system is working properly. Test-

ing the system once every three months is required

to make sure the transfer switch will transfer the

load to the generator set, should there be a utility

power failure.

To complete a system and periodic test,

1. Switch the main circuit breaker from the “ON”

to the “OFF” position.

2. Make sure the following occurs.

a. The generator control receives a signal to

start the generator set.

b. After the generator set starts and the TDNE

expires, the load is transferred from the util-

ity to the generator set.

3. Switch the main circuit breaker from the “OFF”

to the “ON” position.

4. Make sure the following occurs.

a. After a 10-minute TDEN time delay, the load

is transferred back to the utility.

b. Once the transfer switch is connected to util-

ity power, the generator set receives a sig-

nal to cool down the generator set.

c. After a 10-minutes TDEC time delay, the

generator set stops.

NOTE: When ending a test, you can bypass the re-

transfer time delay (TDEN) and cause the

immediate load retransfer by pressing the

Override button. The generator set stops af-

ter the engine cooldown time delay (TDEC).

3-3

GENERATOR EXERCISER

The generator set should be run at least once every

28 days to make sure it operates properly. The exer-

ciser will automatically start the generator set and

let it run for 20 minutes once every 28 days. The au-

tomatic exercise is set by pressing the Set Exercise

pushbutton.

Setting An Exercise Period

The operator has to be present at the transfer

switch to set the start time of the exercise. There are

two ways to start an exercise period. It can be set to

start immediately and repeat at this time every 28

days or it can be set to start 12 hours from now and

repeat at that time every 28 days.

There is a 12-hour offset feature so that the opera-

tor does not have to be present at an inconvenient

time. For example, you can set the exercise at 3:00

PM so that it will start at 3:00 AM.

Step 2 below shows how to set the 12-hour offset

and step 3 below shows how to set an immediate

exercise period.

1. Verify that the Exercise LED is off.

2. To set and exercise period that will start 12

hours from now and repeat every 28 days

from that time, press and hold the Set Exercise

pushbutton for 5 seconds. The Exercise LED

flashes at a rate of twice per second for 5 sec-

onds and then stays on when the exercise peri-

od is set. A delayed 20 minute exercise period

will start in 12 hours. The Exercise LED flashes

at a rate of once per second during the exercise

period. When the exercise period is over, the

Exercise LED quits flashing and remains on to

signify that repeat exercise periods are en-

abled.

3. To start an immediate exercise period and

have it repeat, press and hold the Set Exercise

pushbutton for 5 seconds. The Exercise LED

flashes at a rate of twice per second for 5 sec-

onds and then stays on. Momentarily press the

Set Exercise pushbutton a second time within

ten seconds and an exercise period will start

immediately. Momentarily pressing and releas-

ing the Set Exercise pushbutton a second time

starts an immediate 20 minute exercise period

instead of waiting for 12 hours. The Exercise

LED flashes at a rate of once per second during

the exercise period. When the exercise period

is over, the Exercise LED stops flashing and re-

mains on to signify that repeat exercise periods

are enabled.

4. Record the exercise start time for future refer-

ence.

Canceling Repeat Exercise Periods

With the control panel Exercise LED on steady,

press and hold the Set Exercise pushbutton for 5

seconds. The Exercise LED flashes at a rate of

twice per second for 5 seconds and then goes out to

signify that repeat exercise periods are cancelled.

Canceling An Active Exercise Period

Active exercise periods can be canceled by press-

ing the Override pushbutton on the control panel.

Power Source Failure During An Active

Exercise Period

If either power source fails during an active exercise

period, the control immediately terminates the exer-

cise and proceeds with the automatic mode of op-

eration.

3-4

THIS PAGE LEFT INTENTIONALLY BLANK

4-1

4. Troubleshooting

This section includes a description of the control

LED indicators and provides preliminary trouble-

shooting checks.

OPERATOR PANEL LED INDICATORS

The operator panel contains six LED indicators that

provide some information about the current control

status and may be helpful in troubleshooting the

transfer switch (see Figure 4-1). Descriptions of

these indicators are included in Table 4-1.

Test Override Set Generator

Exercise

Test

Control operation could be delayed by external source.

PowerCommand

UTILITY

POWER

AVAILABLE

LED

GENERATOR

POWER

AVAILABLE

LED

UTILITY POWER

CONNECTED LED

GENERATOR

POWER

CONNECTED

LED

ACTIVE SET OR

PROGRAMMED

EXERCISE LED

TEST

ACTIVITY

LED

TEST

PUSHBUTTON

OVERRIDE

PUSHBUTTON

SET EXERCISE

PUSHBUTTON

FIGURE 4-1. CONTROL PANEL

4-2

TABLE 4-1. OPERATOR PANEL LED INDICATORS

Indicator Definition

Utility Power Available This indicator lights when the utility source voltage sensor has determined that Utility

power is available and is within acceptable voltage limits.

Utility Connected 1. Lights constantly when the transfer switch is connected to the Utility.

2. Blinks once per second when the transfer switch has failed to connect to or

disconnect from the Utility when commanded.

3. Is off when the transfer switch is not connected to the Utility.

Generator Power Available This indicator lights when the generator source voltage sensor has determined that

generator power is within acceptable voltage and frequency limits.

Generator Connected 1. Lights constantly when the transfer switch is connected to the Generator.

2. Blinks once per second when the transfer switch has failed to connect to or

disconnect from the Generator when commanded.

3. Is off when the transfer switch is not connected to the Generator.

Exercise The following describes the Exercise LED when an exercise is enabled.

1. Lights constantly when repeat exercise periods have been set.

2. Blinks twice per second when the Set Exercise button is pressed and held to set

or cancel an exercise period.

3. Blinks once per second when an exercise period is active.

4. Is off when no repeat exercise periods are set.

Test 1. This indicator blinks at two times per second rate during the two seconds that the

Test button is pressed to acknowledge that a test has been activated or when the

remote test input is grounded.

2. The indicator lights constantly during the test and goes out once the test is termi-

nated or normal power has failed.

3. The indicator blinks at two times per second rate during the two seconds to ac-

knowledge that the Test button has been pressed to cancel a Test. The light then

goes out.

4-3

TROUBLESHOOTING THE TRANSFER

SWITCH

Use the troubleshooting guide (Table 4-2) to help

diagnose transfer switch problems with transfer

switches that include a control panel. Common

problems are listed with their possible causes. Re-

fer to the corrective action column for the appropri-

ate corrective procedure.

TABLE 4-2. TROUBLESHOOTING TRANSFER SWITCHES WITH AN OPERATOR PANEL

AC power within the cabinet presents a shock hazard that can cause severe personal

injury or death. Do not remove the front panel under any circumstances.

Improper operation of the generator presents a hazard that can cause severe personal

injury or death. Observe all safety precautions in your generator manuals.

WARNING

Problem Possible Cause Corrective Action

The Generator does not start

when the utility fails

There may be a generator problem. Move the generator’s operation selector

switch to the Run/On position.

1. If the generator starts and the trans-

fer switch transfers, the generator

may not have received the start sig-

nal from the controller. Contact your

local Cummins distributor for ser-

vice.

2. If the generator does not start, con-

tact your local Cummins distributor

for service.

The generator is running but

the transfer switch did not

transfer the load to the gener-

ator. The Generator Available

LED is off.

The generator circuit breaker has been

tripped or is in the Off position.

Reset the circuit breaker on the genera-

tor. If the problem still persists, contact

your local Cummins distributor for ser-

vice.

The generator is running but

the transfer switch did not

transfer the load to the gener-

ator. The Generator Available

LED is on.

A time delay normal to emergency

(TDNE) may be timing.

Wait until the time delay has expired or

press the Override pushbutton on the

control panel. If the problem still per-

sists, contact your local Cummins dis-

tributor for service.

The generator is running but

the transfer switch did not

transfer the load to the gener-

ator. The Utility Connected

LED is flashing.

The control was unsuccessful in its at-

tempts to open the Utility side of the

transfer switch. After 5 attempts to move

the transfer switch, the Utility Connected

LED flashes, indicating that it failed to

open.

Press the Override pushbutton on the

control panel to reset the control so that

it will attempt to open the Utility side of

the transfer switch. If the problem still

persists, contact your local Cummins

distributor for service.

Utility power is restored but

the transfer switch does not

transfer to the utility. The Utili-

ty Power Available LED is off.

The main service circuit breaker has

been tripped or is in the Off position.

Reset the circuit breaker on the main

service panel. If the problem still per-

sists, contact your local Cummins dis-

tributor for service.

Utility power is restored but

the transfer switch does not

transfer to the utility. The Uti-

lity Power Available LED is

on.

A time delay emergency to normal

(TDEN) may be timing.

Wait until the time delay has expired or

press the Override pushbutton on the

control panel. If the problem still per-

sists, contact your local Cummins dis-

tributor for service.

4-4

TABLE 4-2. TROUBLESHOOTING TRANSFER SWITCHES WITH AN OPERATOR PANEL (CONTINUED)

AC power within the cabinet presents a shock hazard that can cause severe personal

injury or death. Do not remove the front panel under any circumstances.

Improper operation of the generator presents a hazard that can cause severe personal

injury or death. Observe all safety precautions in your generator manuals.

WARNING

Problem Corrective ActionPossible Cause

Utility power is restored but

the transfer switch does not

transfer to the utility. The

Generator Connected LED is

flashing.

The control was unsuccessful in its at-

tempts to open the Generator side of the

transfer switch. After 5 attempts to move

the transfer switch, the Generator Con-

nected LED flashes, indicating that it

failed to open.

Press the Override pushbutton on the

control panel to reset the control so that

it will attempt to open the Generator side

of the transfer switch. If the problem still

persists, contact your local Cummins

distributor for service.

The generator did not shut

down after the transfer switch

has transferred the load to

the utility.

1. A time delay engine cooldown

(TDEC) may be timing.

2. The selector switch on the generator

control panel may not be in the

correct position.

1. Wait for the time delay to expire. The

time delay may last up to 30 minutes.

2. Make sure the generator control is

set to the Remote position.

If the problem persists, move the gener-

ator control selector switch to the Off

position to shut down the generator.

Contact your local Cummins distributor

for service.

The generator is running for

no apparent reason.

1. The selector switch on the generator

control panel may not be in the

correct position.

2. There may be an active test or

Exercise period. Check to see if the

Test or Exercise LEDs are blinking.

1. Make sure the generator control is

set to the Remote position.

2. Wait for exercise or test period to

expire or press the Override button

to stop and exercise or the test

button to stop a test.

If the problem persists, move the gener-

ator control selector switch to the Off

position to shut down the generator.

Contact your local Cummins distributor

for service.

4-5

TABLE 4-2. TROUBLESHOOTING TRANSFER SWITCHES WITH AN OPERATOR PANEL (CONTINUED)

AC power within the cabinet presents a shock hazard that can cause severe personal

injury or death. Do not remove the front panel under any circumstances.

Improper operation of the generator presents a hazard that can cause severe personal

injury or death. Observe all safety precautions in your generator manuals.

WARNING

Problem Corrective ActionPossible Cause

The generator did not exer-

cise when expected to.

1. The selector switch on generator

control panel may not be in the cor-

rect position.

2. An exercise period may not be set

or is set but not yet started.

3. There may be generator problems.

1. Verify that the operation selector

switch on the generator control pan-

el is set to the Remote position.

2. Check the Exercise LED on the con-

trol panel to see if it is lit.

a. If the Exercise LED is not lit, no

exercise period has been set.

Refer to the generator exerciser

section for information on setting

an exercise.

b. If the Exercise LED is lit but not

flashing, the exercise period has

not yet started. Exercisers do not

display exercise start and stop

times.

3. Try starting the generator using its

start-stop controls. If it does not

crank, check the starting batteries

and cable connections. If it cranks

but does not start, check the fuel

supply.

If the problem persists, contact your lo-

cal Cummins distributor for service.

4-6

HOW TO OBTAIN SERVICE

When the transfer switch requires servicing, con-

tact your nearest Cummins Power Generation dis-

tributor. Factory-trained Parts and Service repre-

sentatives are ready to handle all your service

needs.

To contact your local Cummins Power Generation

(CPG) distributor in the United States or Canada,

call 1-800-888-6626 (this automated service uti-

lizes touch-tone phones only). By selecting Option

1 (press 1), you will be automatically connected to

the distributor nearest you.

If you are unable to contact a distributor using the

automated service, consult the Yellow Pages. Typi-

cally, our distributors are listed under:

Generators-Electric,

Engines-Gasoline or Engines-Diesel, or

Recreational Vehicles-Equipment,

Parts and Service.

If it is necessary to contact a distributor regarding

the transfer switch, always give the complete Model

and Serial number. This information (included on

the model and serial number label − see Figure 4-2)

is necessary to properly identify your unit among

the many types manufactured.

For models with a control, the label is located on the

back of the operator panel cover. To view the label

(see Figure 4-2), remove the screw securing the op-

erator panel cover and open the cover (see Figure

4-3).

Model No. ____________

Serial No. ____________

FIGURE 4-2. MODEL AND SERIAL NUMBER LABEL

PANEL COVER

SCREW TO

BE REMOVED

FIGURE 4-3. OPERATOR PANEL COVER

Cummins Power Generation

1400 73rd Ave. NE

Minneapolis, MN 55432 USA

Phone 1 763 574 5000

Toll-free 1 800 888 6626

Fax 1 763 574 5298

Email www.cumminsonan.com/contact

www.cumminsonan.com

CumminsR, OnanR, the “C” logo, and “Performance you rely on.”

are trademarks of Cummins Inc.

962 0134OM 0134 Onan RSS100 RSS200 Transfer Switch Operator's Manual (08 2007)

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